(70 ILCS 1905/21)(from Ch. 114, par. 381)Sec. 21. Bondholders legal action. Any trust agreement or agreements entered into with or for the benefit
of the bondholders may prescribe by whom or on whose behalf action may be
taken by the bondholders, and in the absence of any such provision in the
trust agreement or agreements, any holder of a bond or bonds, or of any of
the coupons of any bond or bonds, issued under the provisions of this Act,
subject only to a contractual restriction binding upon any such bondholder
or holders, may:(a) By mandamus, injunction, or other civil action, compel
the Authority, and
the member or members, officers, agents or employees thereof, to perform
each and every term, provision and covenant contained in any resolution,
trust agreement or contract with or for the benefit of such bondholder, and
to require the carrying out of any or all such covenants and agreements of
the Authority and the fulfillment of all duties imposed upon said Authority
by this Act.(b) By civil action, sue to enjoin any acts or things which may be
unlawful, or in violation of any of the rights of said bondholder.(Source: P.A. 83-345.)